CN1224558A

CN1224558A - Arrangement in which useful signal is transmitted between at least two device units

Info

Publication number: CN1224558A
Application number: CN98800518.2A
Authority: CN
Inventors: J·Y·慕勒
Original assignee: Koninklijke Philips Electronics NV
Current assignee: Koninklijke Philips NV
Priority date: 1997-02-28
Filing date: 1998-01-29
Publication date: 1999-07-28
Anticipated expiration: 2018-01-29
Also published as: WO1998038778A3; CN1210931C; US6044280A; WO1998038778A2; KR20000065062A; JP2000510309A; EP0920769A2

Abstract

An arrangement is described in which a useful signal is transmitted between at least two device units each having its own power supply circuit, the power supply circuit of at least one of these device units being supplied with power from a preferably electrochemical energy storage means and the power supply circuit of at least a second one of these device units being supplied with power from a power supply mains. In order to enable backup operation of the device unit or device units powered from the power supply mains in case of failure of the power supply mains, at least one of the device units powered from a power supply mains can be coupled, preferably directly, to at least one of the device units powered from an energy storage means for their common power supply from the energy storage means and/or for useful-signal transmission via coupling elements.

Description

The equipment of transmission useful signal between at least two units

The present invention and useful signal respectively have the equipment that transmits between the unit of power circuit independently relevant at least two, the power circuit of one of them described unit is by one, preferably electrochemical, the energy storage device power supply, and at least wherein the power circuit of another described unit is powered by utility grid.

This equipment for example is used for electric or electronic equipment and the cordless telephone by the remote control of high-frequency transmission useful signal.In this equipment,,, just can not work by the unit of utility grid power supply as because electrical network breaks down if the utility grid power supply is interrupted suddenly.In the example of cordless telephone, even this means that but all the other units are in operating state, can not carry out work.In this case, cordless telephone can not be called out, and can not receive the calling of sending.This can not learn or can not in time learn under the problematic situation of utility grid annoying especially.Specifically, must be equipped with an additional battery unit for the base of cordless telephone in Britain, it is connected with the electric supply installation (main power source) of cordless fixed part, replaces the power supply power supply when electrical network breaks down.Yet this battery unit is relatively heavier, and cordless telephone is also seldom used it usually.Though need the cost spending, but still might when electrical network breaks down, not have enough electric energy to provide by battery, thereby can not play the effect of desired stand-by power supply for this reason.Therefore, the sort of situation of inserting new battery or owing to inner leakage current battery being finished tele-release finally can not appear for example forgetting.

The objective of the invention is to constitute a kind of such as previously proposed equipment, making under the situation that utility grid breaks down can emergency action by the equipment of utility grid power supply, and does not have above-mentioned shortcoming.According to the present invention, this purpose reaches with the sort of equipment as previously proposed, wherein at least one unit by the utility grid power supply can be connected with at least one unit by an energy storage device power supply, preferably directly connect, make them all by this energy storage device power supply and/or by interface unit transmission useful signal.Therefore, in equipment of the present invention, no longer need to be equipped with emergent independent reserve energy storage device, for example be the device of battery unit form to the unit power supply of powering by utility grid.So just can reduce volume greatly, and fully reduce cost by the unit of utility grid power supply.In addition, also save working cost, otherwise needed often to change the battery in battery unit.The result, compare with the equipment of prior art, the functional reliability of equipment proposed by the invention is improved, because needed to be monitored especially by the energy storage device in the unit of energy storage device power supply, guarantees that they all are in the state that can well power at any time.

Equipment proposed by the invention not only can be used for described cordless telephone, also can be used for other many at least one unit and at least one other equipment by transmission useful signal between the unit of utility grid power supply of being powered by energy storage device therein.If the latter is not by the utility grid power supply but by another energy storage device power supply, can uses the present invention yet.In this case, this unit can be moved by emergent support of described connector by the former energy storage device.The operation of this reinforcement is possible under the situation of cordless telephone not only, and also is possible under the situation of other cordless apparatus that the transmit useful signal household electronic amusement equipment of remote controller (as have).For example, adopt the radio receiver after equipping like this, just can be in very limited in emergency circumstances receiving.If the useful signal transmission equipment comprises a fixed part and the moving part by the energy storage device power supply by the utility grid power supply, perhaps comprise a plurality of moving parts and/or fixed part, that is to say and at least temporarily to keep at least one moving part for the reinforcement operation of supporting the useful signal transmission equipment and at least one fixed part is under the situation about can work, adopt advantageous particularly of the present invention.

No matter connect each unit according to the present invention by connector and not only can support above-mentioned reinforcement operation under the situation that utility grid breaks down, but also can transmit useful signal, be to transmit separately or transmit with power supply.For this reason, should make connector be fit to the transmission useful signal.As long as this makes a few modifications, making can provide the direct current of power supply can transmit the useful signal of interchange again by same connector.Through amended like this equipment the particularly advantage that can work of the device of wireless transmission useful signal of transmission useful signal is arranged when reinforcement are moved usually, thereby further saved the required energy of reinforcement operation.Particularly under the situation of cordless telephone, can also pass creatively connects the advantage that described each unit can transmit useful signal reliably.This does not have under the situation of fault in utility grid may also be desirable.

Describe some embodiment by way of example in detail below in conjunction with accompanying drawing.Wherein, the device institute aiming symbol to identical is identical.In these accompanying drawings:

Fig. 1 a to 1d shows the various forms of first embodiment of the equipment that constitutes by the present invention, comprising the connector of realizing with cable; And

Fig. 2 is shown schematically in the schematic diagram of second embodiment that comprises the connector of realizing with the on-hook contact point.

The embodiment of the equipment of transmission useful signal between unit shown in Fig. 1 a is a cordless telephone, and it comprises the fixed part 1 and the moving part 2 that are also referred to as base.Fixed part 1 forms a unit, has one by the power circuit of utility grid by terminals 4,5 power supplies.On the contrary, moving part 2 has one by an electrochemical energy storage device, storage battery preferably, the power circuit of power supply.Between fixed part 1 and moving part 2, transmit useful signal.Under this situation, this is to comprise that by transmission the information signal of the voice signal (being the digital coding form if necessary) that is modulated on the electromagnetic wave realizes.In order to transmit this useful signal, fixed part 1 and moving part 2 have

antenna

7 and 8 respectively.

The basic structure that comprises the cordless telephone of at least one fixed part and at least one moving part is well-known on principle, so summarizes very much shown in Fig. 1 a.By

terminals

9,10, fixed part 1 is connected with

telephone network.Terminals

9,10 cause and comprise as require the ordinary phone module 11 of configuration in telephone, to produce and/or conversion voice and dialing signal.Therefore, be also referred to as dialing and sound circuit below the module 11.Realization contains the example of the telephone of this dialing and sound circuit can be referring to " application manual 1995 " and " wire communication " of Fei Lipu semiconductor company, and these two data are classified reference of the present invention as.

Fixed station 1 also comprises a useful signal transmitting stage 12 that is connected with antenna 7, in this one-level, deliver to antenna 7 transmissions behind dialing and the voice signal that provides of sound circuit 11 treated (promptly encode and/or modulate), and the useful signal conversion from mobile radio station 2 (being demodulation and/or decoding) that antenna 7 receives becomes voice and/or dialing signal to deliver to dialing and sound circuit 11, is added on the telephone network by

terminals

9,10 again.

Similar, moving part 2 comprises useful signal transmitting stage 13 and dialing and sound circuit 14, and they all are connected to the electrochemical energy storage device 6 as their power supply.The useful signal transmitting stage 13 of moving part 2 links to each other with the antenna 8 of moving part 2, is used for the useful signal from fixed part 1 is transformed into voice signal, or voice and/or dialing signal are transformed into useful signal send to fixed part 1 by antenna 8.In the useful signal transmitting stage 12 of fixed part 1, carry out the respective handling of modulation and demodulation and Code And Decode (as the words of usefulness) in reciprocal mode.In moving part 2, switched voice and/or dialing signal between useful signal transmitting stage 13 and dialing and sound circuit 14 in a similar manner.Search the pick-up 15 of voice and the earphone 16 of recovery voice and in moving part 2, be connected to dialing and sound circuit 14.

The basic structure of above-described cordless telephone can be referring to chapter 9 " realization technology " (" Cordless Telecommunications in Europe " by WallyH.W.Tutlebee of " European wireless communication " book, Springer-Verlag London, 1990, pp209,210).Circuit for cordless telephone also can be with reference to publication " Siemens's device " (" SiemensComponeats ", Volume29, No.1/94 of January/February 1994, pp18 to 21).

The power circuit 3 of fixed part 1 comprises a transformer 17, and its primary coil 18 is connected to terminals 4,5, and its two secondary coils, 19,20 mutually insulateds are connected to

rectification stage

21 and 22 respectively.First rectification stage 21 is connected to the on-

hook contact point

23,24 on the casing of fixed part 1.

When moving part 2 is placed on the corresponding bracket on the fixed part 1, on-

hook contact point

23,24 respectively with moving part 2 on corresponding on-

hook contact point

25,26 directly contact.Under this operating state, electrochemical energy storage device 6 is connected to first rectification stage 21 by these on-hook contact points 23 to 26, obtains charging.

Passing through terminals 4,5 and power circuit 3 by utility grid directly to fixed part 1, be dialing and sound circuit 11 and the useful signal transmitting stage 12 in the fixed part 1, under the situation of power supply, if power supply has problem, just dialing and sound circuit 11 and useful signal transmitting stage 12 can not be worked.So being connected between the

terminals

9,10 that are connected with telephone network and moving part 2 is interrupted, though telephone network and moving part 2 endure separately.According to the present invention, in order to remedy this undesirable situation, be when the fixed part power supply has fault, to make cordless telephone (or equipment of other similar of any and useful signal emission) carry out work in principle as a telephone (or equipment of transmission useful signal) in utility grid.According to the present invention, in the embodiment shown in Fig. 1 a, used a cable 27 for this reason, this root cable just forms the connector that is used for powering.The two ends of this root cable are connected to socket 30 on the fixed part 1 and the socket 31 on the moving part 2 by plug 28 and 29 respectively.Therefore, the electrochemical energy storage device 6 of moving part 2 just can pass through socket 30 and 31, plug 28 and 29 and cable 27 to fixed part 1 power supply.

According to the present invention, fixed part 1 comprises a power transfer device 34, is shown a multitool mechanical switch in Fig. 1 a, but preferably also can be electronic on-off-type.Power transfer device 34 has the switching cutter of four mutually insulateds, two

power lines

35,36 that are connected to useful signal transmitting stage 12 respectively wherein, and in addition two be connected to the dialing of fixed part and the

power line

37,38 of sound circuit 11 respectively.Therefore, can power respectively to dialing and sound circuit 11 and useful signal transmitting stage 12.Four switching cuttves respectively can be connected to a corresponding switching contact at two on off states of power transfer device 34, and switching just means that four switching cuttves are transferred to another group switching contact from one group of contact point of walking around between on off state.When power transfer device 34 is in first state with switch the power circuit 3 that first group of switching contact that cutter is connected be connected to fixed part 1 in the output of second rectification stage 22, make second rectification stage 22 can walk abreast simultaneously and power to dialing and sound circuit 11 and useful signal transmitting stage 12.This first on off state is corresponding to fixed part 1 normal operation, and as in traditional cordless telephone, whole fixed part is powered by terminals 4,5 by utility grid.

When power transfer device 34 was in the second switch state, the switching cutter of this device was connected to each low level switching contact.Therefore, at the second switch state, second rectification stage 22 and dialing and sound circuit 11 and 12 disconnections of useful signal transmitting stage.For it, the

power line

35,36 of useful signal transmitting stage 12 is connected to electrochemical energy storage device 6 in the moving part 2 by the socket on the fixed part 1 30, band plug 28 and 29 cable 27 and the socket 31 on the moving part 2.In fixed part 1, be designated as 39,40 for additional supply line that this disposed according to the present invention, in moving part 2, be designated as 41,42.Socket 30,31 all has for being connected the corresponding joint contact that these power lines are equipped with plug 28,29.

The switching cutter that the

power line

37,38 with dialing and sound circuit 11 of power transfer device 34 is connected is connected to two switching contacts that are connected with the output 43,44 of power source special circuit 45 respectively.Power source special circuit 45 is powered by

terminals

9,10 by telephone network.Yet, it should be noted that the power that allows usually to obtain from telephone network is very little, therefore generally by the utility grid cordless telephone power supply bigger to power consumption.Both by telephone network (by power circuit 45) also by the electrochemical energy storage device 6 (by cable 27) of moving part 2 to fixed part 1 power supply, purpose is the energy of electrochemical energy storage device 6 of practicing every conceivable frugality.

According to the dialing of fixed part 1 and the realization situation of sound circuit 1, possible its required power surpasses the power that permission obtains from telephone network.In this case, Fig. 1 a apparatus shown should be by correct shown in the dotted line.So dialing and sound circuit 11 are divided into two submodules 111,112.First submodule is powered by

power line

37,37 by second rectification stage 22 when power transfer device 34 is in first on off state, and is powered by power source special circuit 45 when power transfer device 34 is in the second switch state.On the contrary, the connection of second submodule 112 shown in by a dotted line received on the

power line

35,36, when power transfer device 34 is in first on off state, power, and when power transfer device is in the second switch state, power by

additional supply line

39,42 and cable 27 by the electrochemical energy storage device 6 of moving part 2 by second rectification stage 22.

In the embodiment shown in Fig. 1 a, power transfer device 34 connects 46 in the conversion between first and second on off states by the driving that is connected to the socket 30 on the fixed part 1 to be carried out.Drive connection 46 and whether inserted the on off state of the socket 30 change power transfer devices 34 on the fixed part 1 according to plug 28.Best, it can be the mechanical of thimble plug and so on that this driving connects 46.When utility grid had fault, the user just ordered about electronic switching device shifter 34 automatically and enters desired on off state by be connected and fixed portion 1 and moving part 2 with cable 27.

In the equipment shown in Fig. 1 a, no matter which on off state power transfer device 34 is in, and useful signal all is by useful

signal transmitting stage

12,13 and 7,8 transmission of the antenna that is attached thereto respectively.For further conserve energy under the situation of powering, the apparatus modifications shown in Fig. 1 a can be become the form of implementation shown in Fig. 1 b by electrochemical energy storage device 6.In this embodiment, between the dialing of fixed part 1 and sound circuit 11 and useful signal transmitting stage 12, insert (a first) switching stage 47, and between the useful signal transmitting stage 13 of moving part 2 and dialing and sound circuit 14, inserted another (second) switching stage 48.Similar with power transfer device 34, (first) switching stage 47 of fixed part 1 also can connect 46 change on off states by driving.(the first) switching stage 47 forms the dialing of fixed part 1 and sound circuit 11 and is connected with useful signal between the useful signal transmitting stage 12 when being in corresponding first on off state of first on off state of power transfer device 34, is connected and disconnect this useful signal when being in the corresponding second switch state of the second switch state of power transfer device 34.

For transmission useful signal when power transfer device 34 is in the second switch state, fixed part 1 has a line 32, causes socket 300 from dialing and sound circuit 11.Socket 300 is corresponding with the socket 30 of Fig. 1 a, but an additional terminal of line 32 is in succession arranged.Equally, the cable 27 of Fig. 1 a has also been done modification, and the line for a transmission useful signal forms among Fig. 1 b and is designated as 270 cable.Cable 270 is corresponding to have adaptive plug 280,290.Plug 290 can be connected to the socket 310 on the moving part 2.Socket 310 is corresponding with the socket 31 among Fig. 1 a, but an additional useful signal link is arranged.Useful signal is by transmission between socket 310 and the dialing and the sound circuit 14 of line 33 in moving part 2.Socket 310 on the moving part 2 among Fig. 1 b comprises that also one drive to connect 49, and it is connected 46 similar with driving in the fixed part 1, can form with a thimble plug.Utilizing this drive to connect 49 switches (second) switching stage 48 between (first) switching stage 47 corresponding on off states of two and fixed part 1.Therefore, transmit useful signals at first on off state by antenna 7, and transmit useful signals by

line

32,33 and cable 270 at the second switch state.

In the embodiment shown in Fig. 1 b, modification has been done in the power supply of the useful signal transmitting stage in fixed part 1 and moving part 2 12,13 respectively, make it to be fit to altered useful signal transmission path.When power transfer device 34 and switching

stage

47,48 were in first on off state, with comparing among Fig. 1 a, electric power thus supplied did not change.Yet when being in the second switch state, the

power line

35,36 of the useful signal transmitting stage 12 in the fixed part 1 no longer is connected to

additional supply line

39,40, but with isolated from power.Equally, the useful signal transmitting stage 13 in the moving part 2 is also because the action of energy storage device switching device shifter 50 and the isolated from power that electrochemical energy storage device 6 is provided.In Fig. 1 b, this switching device shifter is shown a double-pole switch, also connects 49 by the driving in the moving part 2 and drives.This switch that forms energy storage device switching device shifter 50 is connected to useful signal transmitting stage 13 with electrochemical energy storage device 6 when being in corresponding first on off state of first on off state of power transfer device 34, and when being in the corresponding second switch state of the corresponding second switch state of the second switch state of power transfer device 34 with useful signal transmitting stage 13 disconnections in electrochemical energy storage device 6 and the moving part 2.

Therefore, in the embodiment shown in Fig. 1 b, under the situation that utility grid breaks down, electrochemical energy storage device 6 will only be powered to dialing and sound circuit 11,14, and no longer to 12,13 power supplies of useful signal transmitting stage.The result, the load of electrochemical energy storage device 6 alleviates greatly, makes that the power source special circuit 45 to dialing and sound circuit 11 (perhaps being its first submodule 111 at least) power supply in the fixed part 1 need not be worked under the situation that utility grid breaks down in Fig. 1 b.Not now output 43,44 but

additional supply line

39,40 is connected to the switching contact of power transfer device 43, be connected to the dialing of fixed part 1 and the

power line

37,38 of sound circuit 11 at the second switch state by power transfer device 43.

Fig. 1 c shows another embodiment, wherein power supply and the useful signal between fixed part 1 and moving part 2 transmission situation is still pressed Fig. 1 b, but correct shown in Fig. 1 a is then pressed in the dialing of fixed part 1 and the power supply of sound circuit 11, will dial and sound circuit 11 be divided into two submodules 111,112.For this reason,

power line

37,38 is connected to the dialing of fixed part 1 and first submodule 111 of sound circuit 11, and second submodule 112 is connected to independently power line 51,52.Two additional switching cuttves of the power transfer device 34 among independent current source line 51,52 and expander graphs 1a and the 1b are connected, and this is designated as 340 through expansion or power transfer device of revising.Modified power transfer device 340 is connected to second rectification stage 22 with the dialing of fixed part 1 and two submodules 111,112 and the useful signal transmitting stage 12 of sound circuit 11 when being in first on off state, by utility grid power supply, and when being in the second switch state, the

power line

37,38 of first submodule 111 is connected to the output 43,44 of power source special circuit 45.When modified power transfer device 340 was in the second switch state, second submodule 112 was connected to

additional supply line

39,40 by independent current source line 51,52, was therefore powered by cable 270 by electrochemical energy storage device 6.In this case, because the dialing and the sound circuit 11 of fixed part 1 is divided into submodule 111,112, the power that makes power source special circuit 45 draw from telephone network is no more than permissible value.

Fig. 1 d shows another modification of the said equipment.In this embodiment, the cable 271 through suitably revising just is used for transmitting useful signal when power transfer device 34 is in the second switch state.Therefore, the plug 281 that is connect on the cable 271 also only is used to be connected useful signal with 291, also only is used for useful signal on connecting

line

32 and 33 and be installed in

respective socket

301 and 311 on fixed part 1 and the moving part 2 respectively.This embodiment can adopt but dialing and sound circuit 11 power consumptions remain on situation in the allowed band when very little from the power of telephone network absorption by power source special circuit 45 under.This modification shown in Fig. 1 a can make the load of electrochemical energy storage device 6 very little.At the second switch state, just under the out of order situation of utility grid, replace by connection by cable 271 by the useful signal connection of

antenna

7,8 is direct.This makes the load of electrochemical energy storage device 6 even also littler under the normal operation that connects by

antenna

7,8 than equipment.

In above each embodiment shown in Fig. 1 a to 1d, be connected and fixed portion 1 and moving part 2 not only can be used for the situation that utility grid breaks down by respective cable 27,270 and 271, and can be used for to be undertaken by cable the situation of the useful signal transmission of more reliable (also safer).

Fig. 2 shows another embodiment of this equipment of the present invention, and this cordless telephone can be when moving part 2 on-hooks, and (when moving part 2 is in the electrochemical energy storage device 6 that makes it and accepts the position of power circuit 3 chargings of fixed part 1) can carry out telephone talk by its fixed part 1.For this reason, fixed part 1 disposes a pick-up 150 and an earphone 160, and they all are connected to modified dialing and sound circuit 110 in the fixed part 2 among Fig. 2.This modified dialing and sound circuit 110 are connected to telephone network by the terminals 90 of fixed part 1.A kind of reduced representation mode that terminals 90 form as the

terminals

9,10 of Fig. 1 a to 1d illustrated embodiment.Best, it is such that modified dialing and sound circuit 110 are made the dialing and the sound circuit of traditional telephone.It obtains power supply by power line 370.

Fixed part 1 among the embodiment shown in Figure 2 also comprises a composite module 120, and it has a dialing and sound circuit and a useful signal transmitting stage.Therefore, composite module 120 is equivalent to the combination of the dialing of fixed part among the embodiment shown in Fig. 1 a and sound circuit 11 and useful signal transmitting stage 12, but dialing and sound circuit 11 and without separating into submodule 111,112.Composite module 120 passes through terminals 4,5 and power circuit 3 and power line 350,360 power supplies by utility grid.Composite module 120 is connected with antenna 7 with terminals 90, identical among situation and the embodiment shown in Fig. 1 a.

The moving part 2 that simply illustrates among Fig. 2 to be being that known mode for example is configured to as shown in Fig. 1 a in essence, but do not have socket 31, also do not have additional supply line 41,42.As among each cited in front embodiment, the on-

hook contact

25,26 of moving part 2 is corresponding with fixed part 1 on-hook contact 23,24.When moving part 2 on-hooks, that is to say, when moving part 2 relative fixed portions 1 are in the direct position contacting in the on-

hook contact

25,26 of the on-

hook contact

23,24 that makes fixed part 1 and moving part 2, present embodiment is the same with the cordless telephone of prior art, and these contacts are used for making electrochemical energy storage device 6 power supplies of power circuit 3 to moving part 2.Under this operating state, the power supply of power circuit 3 is undertaken by power line 210 (being shown single line for simplicity's sake in Fig. 2).Power line 210 in the fixed part 1 can be connected to on-hook contact 23 by the modified power transfer device 341 that is shown simple switch in Fig. 2.Similar with power line 210, modified power transfer device 341 also is shown a hilted broadsword device for simplicity's sake, can certainly be a suitable multitool device, for example is used for connecting the on-hook contact 24 of ground connection.

Also dispose a curtage transducer 462 on the power line 350,360, be connected to by sense line 463 and detect level 461.Detecting level 461 connects 460 and is connected with modified power transfer device 341 by driving.

Under the situation of equipment operate as normal shown in Figure 2, power by 3 pairs of fixed parts of power circuit 1 by utility grid.Power line 350,360 electricity of being confessed, promptly supply power voltage on the line or corresponding electric current are measured by curtage transducer 462, are transformed into the control signal that drives connection 460 by detecting level 461 again.Connect 460 by driving, make modified power transfer device 341 be set to its first on off state, thereby power line 210 is connected to on-hook contact 23.Therefore, interrupted power supply at this first on off state, thereby this circuit and pick-up 150 and earphone 160 are not worked by power line 370 pairs of modified dialing and sound circuit 110.Useful signal just sends moving part 2 from terminals 90 to by composite module 120 and antenna 7.

Under the situation that utility grid breaks down, by the power failure of power circuit 3 by 350,360 pairs of composite modules 120 of supply lines, so this module is not just worked.Under such working condition, curtage transducer 462 and detection level 461 make modified power transfer device 341 be set to its second switch state, thereby on-hook contact 23 is connected to power line 370.In order to make supply power voltage adaptive, a DC converter 371 can be set in power line 370.Now, the modified dialing of fixed part 1 and sound circuit 110 are connected to electrochemical energy storage device 6 by on-hook contact 23,25 (and obviously do not illustrate 24,26), modified power transfer device 341, power line 370 and DC converter 371, obtain power supply.When modified power transfer device 341 was in the second switch state, just under the situation that utility grid breaks down, fixed part 1 carried out work as a traditional telephone, but was powered by the electrochemical energy storage device 6 of moving part 2.

In addition, the moving part 2 of embodiment shown in Figure 2 can dispose a device that detects the working condition of moving part 2.Utilize this device particularly can detect electrochemical energy storage device 6 and whether be connected to the situation of fixed part 1 for its power supply.If be in such working condition, just can will be configured in useful signal transmitting stage (being equivalent to the useful signal transmitting stage 13 among Fig. 1 a) and dialing and voice call (being equivalent to dialing and sound circuit 14 among Fig. 1 a) and electrochemical energy storage device 6 disconnections in the moving part 2, thus can conserve energy.Also can be dialing and sound circuit and the useful signal transmitting stage that when the corresponding on-hook contact that makes fixed part 1 and moving part 2 is in contact with one another, like this disconnects moving part 2.This can make the above-mentioned detection device in the moving part 2 fairly simple.So, the working condition of utility grid, therefore just pass through the power supply situation of power line 350,360, determined the on off state of modified power transfer device 341, thereby determined that electrochemical energy storage device 6 is by power circuit 3 chargings or to modified dialing and sound circuit 110 power supplies when moving part 2 is in on-hook.

In addition, fixed part 1 as shown in Figure 2 can also be expanded, make under the situation of moving part 2 on-hooks modified dialing and sound circuit 110 also by the utility grid power supply, work the traditional telephone and do not need to electrochemical energy storage device 6 loadings thereby this equipment can resemble under " normally " working condition by utility grid power supply.This possibility for example can be used in hands-free device.

Claims

1. a useful signal respectively has an equipment that independently transmits between the unit of power circuit at least two, have at least one power circuit to have at least another power circuit to power in the described unit by a utility grid by a preferably electrochemical energy storage device power supply, the feature of described equipment is: at least one unit by the utility grid power supply is connected with at least one unit by an energy storage device power supply by some connectors, they preferably directly connect, so that all can and/or transmit useful signal by this energy storage device power supply by described connector.

2. one kind as the equipment that in claim 1, proposed, described equipment is made of a wireless useful signal transmission equipment, one of them unit by the power supply of energy storage device is made of a moving part, and unit by a utility grid power supply constitutes a fixed part of described useful signal transmission equipment.

3. the equipment as being proposed in claim 2 is characterized in that described wireless useful signal transmission equipment is made of a cordless telephone.

4. the equipment as being proposed in claim 1,2 or 3 is characterized in that at least one unit by a utility grid power supply is connected with at least one unit by an energy storage device power supply by some connectors under the situation that described utility grid breaks down.

5. the equipment as being proposed in above any one claim is characterized in that described connector constitutes with cable.

6. the equipment as being proposed in above any one claim is characterized in that described connector constitutes with the on-hook contact.

7. one kind as the equipment that in above any one claim, proposed, it is characterized in that described unit by utility grid power supply respectively comprises a power transfer device, be used for making separately power supply to connect and switch to a unit that is attached thereto the described unit by the energy storage device power supply from power circuit separately.

8. one kind as the equipment that proposed in above any one claim is characterized in that described unit respectively comprises a useful signal switching device shifter, are used for useful signal switched to being transferred to described connector.

9. the equipment as being proposed in claim 7 or 8 is characterized in that described power supply and/or useful signal switching device shifter are used for carrying out automatic switchover when connecting two units.

10. one kind as in claim 3 or the equipment that in arbitrary claim of the dependent claims 4 to 9 of claim 3, is proposed, described equipment has at least one and powers, is connected to the unit of a telephone network by a utility grid, the feature of described equipment be described unit supply power mode for by telephone network selectively to being used for handling and/or sending this part device power supply of useful signal in the described unit at least.